. Author manuscript; available in PMC: 2016 Jul 1.

Published in final edited form as: Lancet Psychiatry. 2015 Jun 15;2(7):601–608. doi: 10.1016/S2215-0366(15)00217-5

Table 2.

Adolescent marijuana use before and after MML passage in the 21 U.S. contiguous states that passed laws up to 2014

	Adjusted Prevalence in states with MML^*
	Pre MML %	Post MML %	AOR	95% CI		p-value
Combined	16.25	15.45	0.92	0.82	1.04	0.185
8th	8.14	6.05	0.73	0.63	0.84	<0.0001
10th	17.94	18.27	1.02	0.90	1.17	0.738
12th	22.68	22.02	0.96	0.84	1.10	0.581

Adjusted prevalences derived from the multilevel model also including non-MML states to control for historical trend, with distributions of covariates fixed at grade-specific overall U.S. distributions averaged over varying number of years pre- and post MML depending on when law change occurred.